Subject
Computer Science
Topic
Computer Hardware
Which I/O addressing concept allows devices to appear in the CPU’s physical address space?
Which I/O addressing concept allows devices to appear in the CPU’s physical address space?
ক)
Memory-mapped I/O (MMIO)খ)
Port-mapped only (PMIO)গ)
Bit-banging onlyঘ)
DMA exclusivelyExplanation
MMIO assigns device registers into addressable memory ranges so normal loads/stores access hardware. Many ISAs support both MMIO and PMIO. DMA transfers bulk data but still relies on programmed registers. MMIO simplifies addressing at the cost of cache hazards.Related questions
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